Dinosaurs may not have been cold-blooded species. Scientists previously believed animals were ectothermic when their bones exhibited growth lines, but recent studies have found growth lines in bones of mammals, specifically those that lived through long periods of unfavorable environmental conditions, like rainfall and temperature changes.

Dinosaurs may have weighed less than we previously thought. Scientists have formulated a new technique for calculating weight and size of large animals that uses lasers to measure how much skin will fit around their skeletons. This advanced method estimates that the Brachiosaur actually weighed 50,706 pounds, not 176,370 pounds like we once thought.

Fossil records from a 150 million-year-old sea reptile reveal that dinosaurs suffered from arthritis. A study of a pliosaur fossil indicated that the sea reptile had an arthritic-like condition in her lower jaw that eventually left her unable to feed.

Scientists believe that dinosaur gas emissions may have raised earth’s temperature. It is estimated that sauropods once released approximately 520 million tons of methane a year, potentially enough to warm earth’s climate.